USGS Water-Year Summary 2021
09147500 UNCOMPAHGRE RIVER AT COLONA, CO
LOCATION - Lat 38°19'53.15", long 107°46'45.21" referenced to North American Datum of 1983, in NW 1/4 NW 1/4 sec.17, T.47 N., R.8 W., Ouray County, CO, Hydrologic Unit 14020006, on right bank 75 ft downstream from county highway crossing, 0.2 mi north of Colona, and 1.0 mi upstream from Beaton Creek.
DRAINAGE AREA - 448 mi².
- WSP 1313: 1904. WDR CO-88-2: Drainage area.
PERIOD OF RECORD - April 1903 to November 1905, April to June 1906 (gage heights and discharge measurements only), October 1912 to current year. Monthly discharge only for some periods, published in WSP 1313. Published as "near Colona" 1904-06, 1922-34. Statistical summary computed for 1986 to current year.
GAGE - Water-stage recorder with satellite telemetry and crest-stage gage. Elevation of gage is 6,320 ft above NGVD of 1929, from topographic map. See WSP 1713 or 1733 for history of changes prior to Sept. 30, 1949. Prior to July 10, 2013, at datum 3.00 ft higher.
PERIOD OF RECORD - April 2019 to current year (seasonal records only).
INSTRUMENTATION - Tipping-bucket rain gage with satellite telemetry. Elevation of gage is 6,320 ft above NGVD of 1929, from topographic map.
EXTREMES FOR PERIOD OF RECORD - (seasonal only) Maximum daily precipitation, 0.78 inches, Aug. 1, 2021.